title: 'High-risk' bundle branch block.
abstract: Even trifascicular block is often asymptomatic or presents with symptoms actually due to other causes. Recent studies into the natural history of chronic branch block have yielded information that facilitates identification of patients at high risk of sudden complete heart block. The authors provide practical insight into diagnosis, etiology, prognostic factors, and clinical management alternatives.
mesh_terms: D000208:Acute Disease; D002037:Bundle-Branch Block / Q000175:diagnosis* / Q000209:etiology / Q000628:therapy; D002304:Cardiac Pacing, Artificial; D003327:Coronary Disease / Q000150:complications; D004562:Electrocardiography; D006329:Heart Conduction System / Q000033:anatomy & histology; D006330:Heart Defects, Congenital / Q000150:complications; D006334:Heart Function Tests; D006801:Humans; D008875:Middle Aged; D009203:Myocardial Infarction / Q000150:complications; D005082:Physical Exertion; D011379:Prognosis